After spending her life with her mentally retarded mother and agoraphobic neighbor, twelve-year-old Heidi sets out from Reno, Nevada, to New York to find out who she is. Living with her mentally disabled mother who only knows just over twenty words, young Heidi has learned to live in her special world until a new word is suddenly used and repeated by her mother; causing Heidi to think it might be a key to a secret past about which she knows so little....

In the early twentieth century, five sisters and their widowed mother, a famed spiritualist, travel from New York to London, and as the Titanic conveys them and their acquaintances, journalist W.T. Stead, scientist Nikola Tesla, and industrialist John Jacob Astor, home, Tesla's inventions will either doom or save them all.

London. Girls are disappearing. They've all got one thing in common; they just don't know it yet . Sixteen-year-old Lily was meant to be next, but she's saved by a stranger: a half-human boy with gold-flecked eyes. Regan is from an unseen world hidden within our own, where legendary creatures hide in plain sight. But now both worlds are under threat, and Lily and Regan must race to find the girls, and save their divided city.